Summary
A new study reveals that most U.S. cities are experiencing more episodes of extreme heat each year compared to 1970. These prolonged heat periods pose health risks, especially in areas with less cooling access, and strain energy resources.
Key Facts
- A study analyzed 247 U.S. cities and found that about 80% are having more frequent heat streaks each year than in 1970.
- An "extreme heat streak" means three or more days in a row with temperatures above normal highs for that area.
- The study showed nearly 200 cities have about two more heat streaks annually on average now.
- The data shows temperature thresholds vary widely, from 66°F in Alaska to 100°F in Arizona.
- Some cities like Nashville and Raleigh have five more heat streaks each year compared to the past.
- A few cities, such as Myrtle Beach and Sarasota, now experience fewer heat streaks than in 1970.
- Climate change is linked to the increased intensity and frequency of extreme heat.
- Urban areas often trap more heat due to the "urban heat island" effect, making them warmer than surrounding areas.
